Skip to main content
Livermore
Livermore
ZHEN

Castleark Management LLC

SEC CIK
0001106832
Latest filing
Aug 14, 2026

Holdings in Q2 2026

Holdings as of Jun 30, 2026, filed Aug 14, 2026. Long positions only; changes compare share counts with Q1 2026.

Institution overview
Positions
309
+17 vs. Q1 2026
Portfolio value
$3.71B
+$687.2M (+22.7%) vs. Q1 2026
Filed
Aug 14, 2026
SEC
Holdings of Castleark Management LLC in Q2 2026
SecurityClassSharesValue% of portfolioShare changeActionHistory
PAYXPaychex IncStock360$35.4K<0.1%00.0%UnchangedHistory
iShares Inc464286822MSCI MEXICO ETF650$48.9K<0.1%+650New–
RPMRPM International IncCOM580$64.5K<0.1%00.0%UnchangedHistory
PFEPfizer IncStock2,971$71.5K<0.1%00.0%UnchangedHistory
FDXFFedEx Freight Holding Company, Inc.COMMON STOCK500$75.5K<0.1%+500NewHistory
LUVSouthwest Airlines CoCOM1,560$80.2K<0.1%00.0%UnchangedHistory
NKENIKE, Inc.Stock2,000$82.1K<0.1%00.0%UnchangedHistory
FISVFiserv IncStock2,000$98.1K<0.1%00.0%UnchangedHistory
SYKStryker CorpStock340$107.0K<0.1%00.0%UnchangedHistory
TRMBTrimble Inc.COM2,160$110.5K<0.1%00.0%UnchangedHistory
iShares Tr464287234MSCI EMG MKT ETF2,000$136.8K<0.1%00.0%Unchanged–
iShares Semiconductor ETF464287523ETF230$147.4K<0.1%+230New–
SGISomnigroup International Inc.COM2,090$163.9K<0.1%−46,695−95.7%ReducedHistory
ITWIllinois Tool Works IncStock770$208.3K<0.1%00.0%UnchangedHistory
iShares Inc464286509MSCI CDA ETF3,670$211.5K<0.1%00.0%Unchanged–
CMICummins IncStock300$214.0K<0.1%00.0%UnchangedHistory
GNTXGentex CorpCOM8,620$217.8K<0.1%00.0%UnchangedHistory
FCXFreeport-McMoran IncStock3,610$227.0K<0.1%00.0%UnchangedHistory
TLNTalen Energy CorpCOM600$230.6K<0.1%−1,320−68.8%ReducedHistory
iShares Tr464287630RUS 2000 VAL ETF1,060$234.5K<0.1%00.0%Unchanged–
IRENIREN LtdORDINARY SHARES5,250$240.1K<0.1%00.0%UnchangedHistory
ETNEaton Corp plcStock590$251.4K<0.1%00.0%UnchangedHistory
iShares Inc46434G772MSCI TAIWAN ETF2,510$272.6K<0.1%00.0%Unchanged–
KOCoca Cola CoStock3,397$276.1K<0.1%00.0%UnchangedHistory
MLMMartin Marietta Materials IncCOM480$276.8K<0.1%−1,280−72.7%ReducedHistory
DIODDiodes IncCOM2,640$288.9K<0.1%+2,640NewHistory
FDXFedEx CorpStock1,000$313.1K<0.1%00.0%UnchangedHistory
ALBAlbemarle CorpStock2,420$326.8K<0.1%+2,420NewHistory
POWLPowell Industries IncStock1,230$352.2K<0.1%00.0%UnchangedConverted for a 3-for-1 splitHistory
iShares Inc46434G822MSCI JAPAN ETF3,870$361.0K<0.1%00.0%Unchanged–
VRTXVertex Pharmaceuticals IncStock730$362.6K<0.1%00.0%UnchangedHistory
MOG.AMoog Inc.CL A860$364.5K<0.1%00.0%UnchangedHistory
EOGEOG Resources IncStock3,000$389.2K<0.1%00.0%UnchangedHistory
MTDRMatador Resources CoCOM8,350$415.7K<0.1%00.0%UnchangedHistory
BEBloom Energy CorpCOM CL A1,460$441.9K<0.1%−53,585−97.3%ReducedHistory
SBUXStarbucks CorpStock4,620$472.1K<0.1%00.0%UnchangedHistory
iShares Russell 2000 Growth ETF464287648ETF1,200$472.8K<0.1%00.0%Unchanged–
ISRGIntuitive Surgical IncCOM NEW1,200$477.2K<0.1%00.0%UnchangedHistory
AEPAmerican Electric Power Co IncStock3,510$480.2K<0.1%+3,510NewHistory
VGVenture Global, Inc.COM CL A43,870$488.3K<0.1%+43,870NewHistory
KNTKKinetik Holdings Inc.COM NEW CL A10,370$501.3K<0.1%00.0%UnchangedHistory
CTASCintas CorpStock2,960$503.4K<0.1%00.0%UnchangedHistory
USACUSA Compression Partners, LPCOMUNIT LTDPAR19,990$527.5K<0.1%00.0%UnchangedHistory
JLLJones Lang Lasalle IncCOM1,720$533.1K<0.1%−9,071−84.1%ReducedHistory
PGProcter & Gamble CoStock3,800$557.2K<0.1%00.0%UnchangedHistory
NEENextera Energy IncStock6,650$583.7K<0.1%00.0%UnchangedHistory
WESWestern Midstream Partners, LPCOM UNIT LP INT13,390$585.9K<0.1%00.0%UnchangedHistory
NFGNational Fuel Gas CoStock7,660$591.4K<0.1%00.0%UnchangedHistory
GLNGGolar LNG LtdSHS12,210$608.5K<0.1%00.0%UnchangedHistory
SNPSSynopsys IncCOM1,372$612.0K<0.1%00.0%UnchangedHistory
VSTVistra Corp.Stock4,160$659.9K<0.1%00.0%UnchangedHistory
ETREntergy CorpCOM5,970$685.7K<0.1%00.0%UnchangedHistory
PCARPaccar IncCOM5,774$693.6K<0.1%00.0%UnchangedHistory
HESMHess Midstream LPCL A SHS18,795$706.7K<0.1%−10,500−35.8%ReducedHistory
RIOTRiot Platforms, Inc.COM26,120$715.2K<0.1%+26,120NewHistory
RMBSRambus IncCOM5,610$744.7K<0.1%+5,610NewHistory
CMECME Group Inc.COM3,400$750.8K<0.1%00.0%UnchangedHistory
NTRANatera, Inc.COM2,780$754.6K<0.1%+2,780NewHistory
EMEEMCOR Group, Inc.Stock910$755.2K<0.1%00.0%UnchangedHistory
NEXTNextDecade CorpCOM106,250$801.1K<0.1%00.0%UnchangedHistory
VRSNVerisign IncCOM3,190$802.5K<0.1%+3,190NewHistory
KEXKirby CorpCOM5,930$806.3K<0.1%+5,930NewHistory
INSMINSMED IncCOM PAR $.017,790$830.6K<0.1%00.0%UnchangedHistory
RKLBRocket Lab CorpCOM8,230$836.6K<0.1%−6,260−43.2%ReducedHistory
FSLRFirst Solar, Inc.Stock3,660$863.6K<0.1%−1,720−32.0%ReducedHistory
SCHWSchwab Charles CorpStock9,360$863.6K<0.1%−494,693−98.1%ReducedHistory
iShares Tr464287861EUROPE ETF12,100$881.5K<0.1%00.0%Unchanged–
BKVBKV CorpCOM32,650$893.3K<0.1%+13,170+67.6%AddedHistory
ATIAti IncStock4,830$952.0K<0.1%+4,830NewHistory
VIAVViavi Solutions Inc.COM20,041$957.0K<0.1%−358,556−94.7%ReducedHistory
TSEMTower Semiconductor LtdSHS NEW3,680$959.2K<0.1%−49,560−93.1%ReducedHistory
SUNSunoco LPCOM UT REP LP14,450$975.4K<0.1%00.0%UnchangedHistory
First Tr Exchange-Traded FD33736G106GBL WND ENRG ETF39,412$984.5K<0.1%00.0%Unchanged–
PWRQuanta Services, Inc.COM1,380$993.7K<0.1%00.0%UnchangedHistory
AMAntero Midstream CorpStock43,680$993.7K<0.1%00.0%UnchangedHistory
TDGTransDigm Group INCCOM770$1.03M<0.1%00.0%UnchangedHistory
VNOMViper Energy, Inc.CL A24,425$1.04M<0.1%00.0%UnchangedHistory
ODFLOld Dominion Freight Line, Inc.COM5,160$1.12M<0.1%−28,750−84.8%ReducedHistory
MTZMastec IncCOM2,690$1.12M<0.1%00.0%UnchangedHistory
TERTeradyne, IncStock2,339$1.13M<0.1%−2,910−55.4%ReducedHistory
KGSKodiak Gas Services, Inc.COM15,320$1.15M<0.1%00.0%UnchangedHistory
WWDWoodward, Inc.COM2,720$1.16M<0.1%00.0%UnchangedHistory
NRGNRG Energy, Inc.Stock8,410$1.23M<0.1%+7,100+542.0%AddedHistory
CEGConstellation Energy CorpStock5,120$1.27M<0.1%00.0%UnchangedHistory
QCOMQualcomm IncStock6,950$1.28M<0.1%00.0%UnchangedHistory
SITMSITIME CorpCOM1,731$1.29M<0.1%−16,053−90.3%ReducedHistory
Spinnaker ETF Series84858T772SELE STO EUR ETF30,800$1.30M<0.1%−116,200−79.0%Reduced–
DTMDT Midstream, Inc.COMMON STOCK9,830$1.44M<0.1%00.0%UnchangedHistory
CRSCarpenter Technology CorpCOM2,480$1.53M<0.1%+880+55.0%AddedHistory
PAAPlains All American Pipeline LPUNIT LTD PARTN70,459$1.57M<0.1%00.0%UnchangedHistory
CAMTCamtek LtdORD9,830$1.60M<0.1%−5,590−36.3%ReducedHistory
AROCArchrock, Inc.COM41,660$1.70M<0.1%−9,030−17.8%ReducedHistory
FLEXFlex Ltd.Stock10,580$1.71M<0.1%00.0%UnchangedHistory
VLOValero Energy CorpStock6,600$1.72M<0.1%−780−10.6%ReducedHistory
SPDR Series Trust78468R556SP O&G EXPL PRO11,470$1.77M<0.1%−33,870−74.7%Reduced–
LECOLincoln Electric Holdings IncCOM6,700$1.78M<0.1%00.0%UnchangedHistory
MPLXMPLX LPCOM UNIT REP LTD32,092$1.81M<0.1%−9,800−23.4%ReducedHistory
iShares Russell 1000 Growth ETF464287614ETF15,080$1.87M0.1%00.0%UnchangedConverted for a 4-for-1 split–
iShares Inc464286400MSCI BRAZIL ETF55,320$1.91M0.1%+55,320New–
MGYMagnolia Oil & Gas CorpCL A74,790$1.91M0.1%00.0%UnchangedHistory

Sold out since Q1 2026 (41)

Positions held at the end of Q1 2026 that are gone from this filing.

Positions of Castleark Management LLC sold out since Q1 2026
SecurityClassShares in Q1 2026Value in Q1 2026% of portfolio in Q1 2026History
ULTAUlta Beauty, Inc.Stock50,629$26.5M0.9%History
FIVEFive Below, IncCOM40,110$9.16M0.3%History
TPCTutor Perini CorpCOM116,440$8.99M0.3%History
HASHasbro, Inc.COM94,701$8.86M0.3%History
SPXCSPX Technologies, Inc.COM41,567$8.31M0.3%History
PAHCPhibro Animal Health CorpCL A COM142,900$7.90M0.3%History
KTOSKratos Defense & Security Solutions, Inc.COM NEW109,634$7.73M0.3%History
ADSKAutodesk, Inc.COM31,940$7.65M0.3%History
IPGPIpg Photonics CorpCOM60,456$6.93M0.2%History
PATKPatrick Industries IncCOM62,180$6.91M0.2%History
ATMUAtmus Filtration Technologies Inc.COM119,350$6.78M0.2%History
SSDSimpson Manufacturing Co., Inc.COM38,382$6.59M0.2%History
CHDNChurchill Downs IncCOM67,810$6.09M0.2%History
IDCCInterDigital, Inc.COM19,876$6.00M0.2%History
ONTOOnto Innovation Inc.COM29,030$5.95M0.2%History
FSLYFastly, Inc.CL A177,688$5.16M0.2%History
MEDPMedpace Holdings, Inc.COM10,030$4.82M0.2%History
RYTMRhythm Pharmaceuticals, Inc.COM52,279$4.55M0.2%History
FFord Motor CoStock380,230$4.39M0.1%History
MANHManhattan Associates IncStock30,580$4.07M0.1%History
IQVIQVIA Holdings Inc.Stock22,580$3.85M0.1%History
BELFBBel Fuse IncCL B16,311$3.23M0.1%History
IRTCiRhythm Holdings, Inc.COM27,193$3.21M0.1%History
COINCoinbase Global, Inc.COM CL A17,630$3.08M0.1%History
EYENational Vision Holdings, Inc.COM117,736$3.05M0.1%History
FIGSFIGS, Inc.CL A199,010$2.94M0.1%History
URIUnited Rentals, Inc.COM3,420$2.49M0.1%History
CELHCelsius Holdings, Inc.COM NEW67,902$2.41M0.1%History
CDECoeur Mining, Inc.COM NEW122,890$2.31M0.1%History
AAOIApplied Optoelectronics, Inc.COM25,700$2.17M0.1%History
MRCYMercury Systems IncCOM25,048$1.83M0.1%History
REALTheRealReal, Inc.COM156,760$1.42M<0.1%History
CHRWC. H. Robinson Worldwide, Inc.COM NEW6,600$1.10M<0.1%History
WMSAdvanced Drainage Systems, Inc.COM7,190$986.0K<0.1%History
GWREGuidewire Software, Inc.COM5,180$774.7K<0.1%History
CRKComstock Resources IncCOM33,370$703.4K<0.1%History
LITELumentum Holdings Inc.COM770$541.1K<0.1%History
GELGenesis Energy LPUNIT LTD PARTN29,980$534.5K<0.1%History
RKTRocket Companies, Inc.Stock34,960$498.2K<0.1%History
PRIMPrimoris Services CorpStock1,390$198.8K<0.1%History
SEESealed Air CorpCOM720$30.3K<0.1%History